I have the 1895 Model new Marlin , also, and have been playing around for a year or so with reloading it.
It is the only rifle I have ever loaded for where, as someone else mentioned, you load to what the shoulder can stand, and I put a LimbSaver on it!
Johnn Peterson gave me his copy of a Handloader magazine issue devoted to reloading the modern Marlins, for which I am forever grateful.
They have every powder and bullet load immaginable, divided into pressure catagories, starting at loads that, "Do not exceed 21,000 CUP," which should be in the Trapdoor Class. Even at that pressure restriction, they have 405 grain bullets going up to 1,700 FPS!
I have loaded up to where a few shots will make my head ache, and I seldom, or maybe never, got out of the, "Loads that do not exceed 28,000 CUP."
I find it about the most gratifying rifle I have ever loaded for. Load up virtually anytning, and it will likely be quite accurate.
Here is a 100 metre target of five "headache variety loadings," 43 grains of 4198 and a 420 grain cast gas check. The magazine shows 44 grains of 4198 with a 400 grain bullet, as coming in the "not to exceed 28,000," catagory.
The flyer here is due to a scope that was coming unglued inside, and shortly really went to pot.
And here is five loaded so light with 4227, that after the report of the rifle going off, you hear the bullet hit the 100 metre target.
And here is ten, with an intermediate, or actually light load, 420 grain bullets at about 1,600 fps. I was experimenting, five were gas checked, I circled the holes, then fire five plain base. Luck, I suppose, but the plain base made a better group.